Tidarren is a genus of tangle-web spiders first described by Ralph Vary Chamberlin & Wilton Ivie in 1934. Males are much smaller than females, and they amputate one of their palps before maturation, entering their adult life with only one palp. Though it is uncertain why they do this, it may be done to increase mobility, as the palps are disproportionately large compared to the size of the body. It may also be done because only one palp is needed. Females of the Yemeni species T. argo tear off the single remaining palp before feeding on males. The palp remains attached to the female's epigynum for about four hours, continuing to function despite being separated from the male's body. Species it contains twenty-four species: Tidarren aethiops Knoflach & van Harten, 2006 — Congo Tidarren afrum Knoflach & van Harten, 2006 — Cameroon, Uganda Tidarren apartiolum Knoflach & van Harten, 2006 — Madagascar Tidarren argo Knoflach & van Harten, 2001 — Yemen, Chad Tidarren circe Knoflach & van Harten, 2006 — Namibia Tidarren cuneolatum (Tullgren, 1910) — Cape Verde Is., Canary Is., Africa, Yemen Tidarren dasyglossa Knoflach & van Harten, 2006 — Madagascar Tidarren dentigerum Knoflach & van Harten, 2006 — Yemen Tidarren ephemerum Knoflach & van Harten, 2006 — Madagascar Tidarren gracile Knoflach & van Harten, 2006 — Yemen Tidarren griswoldi Knoflach & van Harten, 2006 — Cameroon Tidarren haemorrhoidale (Bertkau, 1880) — USA to Argentina Tidarren horaki Knoflach & van Harten, 2006 — Madagascar Tidarren konrad Knoflach & van Harten, 2006 — Yemen Tidarren lanceolatum Knoflach & van Harten, 2006 — Congo Tidarren levii Schmidt, 1957 — Congo Tidarren mixtum (O. Pickard-Cambridge, 1896) — Mexico to Costa Rica Tidarren obtusum Knoflach & van Harten, 2006 — Madagascar Tidarren perplexum Knoflach & van Harten, 2006 — Cameroon, Congo Tidarren scenicum (Thorell, 1899) — Cameroon, Guinea-Bissau, Ivory Coast, South Africa Tidarren sheba Knoflach & van Harten, 2006 — Yemen Tidarren sisyphoides (Walckenaer, 1841) — USA to Argentina, Caribbean Tidarren ubickorum Knoflach & van Harten, 2006 — South Africa Tidarren usambara Knoflach & van Harten, 2006 — Tanzania References External links Theridiidae Araneomorphae genera Taxa named by Ralph Vary Chamberlin Taxa named by Wilton Ivie